Folks have been asking what is the difference between the types of updates available for direct download from the Microsoft Update site, and the updates that are available for synchronization or download to the WSUS servers. At the time of release, Windows Server Update Services supports download (or synchronization) of critical and security updates (and drivers), their associated rollups, and service packs. Additional optional updates such as feature packs, tools, and non-critical drivers are planned and will be available in future WSUS synchronizations with Microsoft Update. While we dont know the precise timeframe more optional updates will be available to WSUS, we can say that is in the future plans. Hope this helps.